OpenAI releases GPT-o3 Pro
An advanced commercial variant that pairs systematic deep reasoning with high-precision text generation.
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OpenAI releases the Codex software-engineering agent
OpenAI released Codex, a software-engineering agent that handles coding tasks in parallel inside a cloud sandbox.
OpenAI brings GPT Image 1 to the API
OpenAI opened ChatGPT's image generation to developers as the gpt-image-1 model in the Images API.
OpenAI releases o3
OpenAI's new-generation reasoning-focused model, strengthening deep math and logical proof.
OpenAI releases o4-mini
A lightweight, low-cost variant that carries complex reasoning and chain-of-thought down to a smaller parameter scale.
OpenAI releases GPT-4.1
A maintenance update to the GPT-4 architecture, with modest gains on everyday tasks and better API cost control.
OpenAI releases GPT-4o Transcribe
OpenAI releases a new generation of GPT-4o-based speech-to-text models.
OpenAI releases GPT-4.5
OpenAI releases an improved GPT-4 model with stronger knowledge, generalization and safety performance.
OpenAI releases o3-mini
OpenAI publicly released o3-mini on January 31, 2025, through ChatGPT and the API.
OpenAI previews Operator, an agent that controls a browser
Operator uses a visual computer-use model to click, type, and scroll through web tasks, handing control back for logins, payments, and sensitive actions.
OpenAI launches Sora as a public video product
OpenAI moves Sora from research preview to a standalone video-generation product for ChatGPT Plus and Pro users.
OpenAI releases o1-pro
OpenAI releases an advanced o1 variant that uses more compute for longer reasoning to improve accuracy.
OpenAI launches GPT-4o Realtime Preview
OpenAI opens the Realtime API public beta for low-latency, native speech-to-speech interaction.
OpenAI previews o1, a model trained to spend more time reasoning
OpenAI releases o1-preview, shifting frontier-model competition toward reinforcement learning and additional computation at inference time.
OpenAI releases GPT-4o mini
OpenAI released GPT-4o mini on July 18, 2024, making the small model available through its API and ChatGPT.
OpenAI releases GPT-4o
OpenAI releases the native multimodal GPT-4o model for real-time interaction with text, images and audio.
OpenAI releases TTS-1 HD
OpenAI releases TTS-1 HD for higher-quality speech synthesis at its first DevDay.
OpenAI launches DALL·E 3 in the Images API
At its first DevDay, OpenAI opens DALL·E 3 through the Images API, allowing developers to integrate text-to-image generation under the dall-e-3 model name.
OpenAI launches the GPT-4 Turbo preview at DevDay
OpenAI announced GPT-4 Turbo with a 128K context window and opened the preview to paying API developers, alongside a separate vision preview model.
OpenAI releases TTS-1
OpenAI releases the real-time text-to-speech model TTS-1 at its first DevDay.